Seamless steel pipes are divided into hot-rolled (extruded) seamless steel pipes and cold-drawn (rolled) seamless steel pipes due to their different manufacturing processes. Cold drawn (rolled) tubes are divided into annular tubes and special-shaped tubes. The available workability for testing the quality of seamless steel pipes throughout the subsequent production and processing.
Put the seamless steel pipe test piece on the bending test machine, and bend it to the angle specified by the specification according to the standard bending core, and there is no crack or crack on the surface of the bending part.
During the flaring test, place the seamless steel pipe specimen on the workbench with the opening facing up. Press the jacking center with standard taper into the seamless steel tube. Until the expansion ratio of the test diameter exceeds the standard, there is no crack on the surface of the test piece.